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A History of Expertise and Innovation

RJ Lee Group has assessed environmental issues since the early 1980s when our Energy Technology Consultants (ETC) pioneered the recognition of specific air quality patterns. We developed a cutting-edge technique for identifying, measuring, and characterizing particles in the air using computer-controlled scanning electron microscopy (CCSEM).

RJ Lee Group has worked with clients in various industries, including the U.S. Environmental Protection Agency (EPA), to assess and provide solutions for environmental factors that could affect our health. Our services have grown over the years, from setting controls for unbound nanoparticles (UNP) to designing and building test chambers to simulate specific environmental conditions.

Today we offer our expertise for our clients’ environmental and compliance concerns and perform rigorous assessment and management of potential environmental risks.

Criminal Forensics

Gunshot Residue (GSR) Test Kits

RJ Lee Group has worked with over 400 agencies, ranging from law enforcement and prosecutorial offices to public and private defense attorneys, throughout the United States and abroad. Our criminal forensics experts are qualified in 36 states, Washington DC, Puerto Rico, and various countries. We comprise a unique blend of talent and scientific knowledge to provide accurate resolutions for our clients.


To help streamline your gunshot residue testing, RJ Lee Group sells two different types of gunshot residue kits, each designed for specific sampling surfaces so you can efficiently collect your samples.

GSR Stub Hand

Product # GSR-SEM - $20.00 USD

Gunshot Residue Collection Kit for Hands and Skin

In our gunshot residue collection kit, scanning electron microscopy (SEM) stubs are covered with double sided adhesive carbon tape. The stubs are designed to sample skin and recover small particles for analysis by SEM.  The price of this kit is deducted from the cost of analysis when both kit and analysis are purchased from RJ Lee Group.

Contained in each kit: 

(4) collection stubs

  • Right Hand Back
  • Right Hand Palm
  • Left Hand Back
  • Left Hand Palm

(1) control stub
(1) pair latex gloves
(1) information sheet
(1) evidence seal
(1) Envelope/Submission Form 

GSR Stub Fabric

Product # GSR-SEM/SUR - $20.00 USD

Gunshot Residue Collection Kit for Fabrics and Surfaces

In our fabric/surface sampling kits, stubs are covered with an adhesive glue. Solid particulate can be collected from a variety of surfaces such as car interiors, table tops, shoes, and clothing for analysis by SEM. These stubs can also be used as passive samplers.

Contained in each kit are 6 unlabeled collection stubs. The price of this kit is deducted from the cost of analysis when both kit and analysis are purchased from RJ Lee Group.

Contained in each kit: 

(6) collection stubs
(1) Evidence seal
(1) Envelope/Submission Form 

Purchase a GSR Collection Kit

Gunshot Residue Collection Kit Request

RJ Lee Group’s GSR kits can be purchased by calling RJ Lee Group’s criminal forensics department at 800-860-1775. 

When a gunshot residue kit purchased from RJ Lee Group is submitted for analysis, you will receive a $20 discount per kit submitted on your analysis cost. 

Case study

Case study

How AeroTech Secured Its Future

When AeroTech Industries faced recurring defects in a crucial aircraft component, they were at risk of losing multi-million dollar contracts and jeopardizing the jobs of hundreds of employees. They enlisted the help of RJ Lee Group, who quickly deployed a team of technical experts. Through state-of-the-art forensic analysis, RJ Lee Group identified and rectified the root cause—a flaw in the casting process—eliminating the defect and preserving AeroTech's contracts.